1. Just as big pharma is guilty of funding research that selectively supports its own products, the natural/herbal crowd can be accused of the same thing. Be critical of every research paper you read. Where did the study get done? Who paid for it? In which journal(s) was it published? Is there significant peer-review evident?
2 No one study, no matter who did it, can prove or disprove anything. Science demands repetition, replication, and clear trends in accumulated data before declaring any conclusion valid.